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Birefringent Crystal

  

Physical and Optical Properties


Transparency Range 500-4000nm 350-2300nm 220-3500nm
Crystal Structure Trigonal Trigonal Trigonal,Space Group R3c
Crystal Class Positive Uniaxial Positive Uniaxial Negative Uniaxial
Crystal Cell a=b=7.12 Å,c=6.29 Å a=6.37 Å a=b=12.532 Å,c=12.717 Å
Density 4.22g/cm3 2.7g/cm3 3.85g/cm3
Hygroscopic Susceptibility High Low Low
Mohs Hardness 5 3 4.5
Thermal Expansion Coefficients aa=4.43*10﹣6/k

ac=11.37*10﹣6/k

aa=24.39*10﹣5/k

ac=5.68*10﹣5/k

Aa=4*10﹣6/k

Ac=36*10﹣6/k

Optical Homogeneity 10﹣6/cm 10﹣6/cm 10﹣6/cm
Absorption Coefficient <0.1%@1064nm< td=""> <0.1%@1064nm< td=""> <0.1%@1064nm< td="">

Refractive Index,

Birefringence(△n=ne-no)

Walk-Off Angle@45°(ρ)

ne=2.2154,No=1.9929

△n=0.2251

ρ=6.042°@633nm

ne=1.48520,no=1.6557△n=0.1705

ρ=6.20°@633nm

ne=1.54381,no=1.67056

△n=0.1222

ρ=4.345°@532nm


Capabilities


Diameter Max.30-40mm Max.150mm Max.40-50mm
Length Max.25-35mm Max.100mm Max.25-35mm
Surface Quality Better than 20/10 Scratch/Dig Per MIL-0-13830A
Beam Deviation <10arc seconds
Optical Axis Orientation +/-0.2°
Flatness <λ/8@633nm
Transmission Wavefront Distortion <λ/4@633nm
Coating  Upon Specification


BIREFRIGENT CRYSTAL


Transparency Range 420-5200nm 120-8500nm 200-2300nm
Crystal Structure Trigonal,Space Group R3c Trigonal,Space Group R3c Trigonal,Space Group R3c
Crystal Class Positive Uniaxial Positive Uniaxial Negative Uniaxial
Crystal Cell a=5.14Å a=b=4.621 Å,c=3.053 Å
Density 4.64g/cm3 3.18g/cm3 2.65g/cm3
Hygroscopic Susceptibility Low Low Low
Mohs Hardness 5 6 7
Thermal Expansion Coefficients

aa=2.0*10﹣6/k@25℃

ac=2.2*10﹣6/k@25℃


aa=6.23-9.25*10﹣6/k

ac=10.86-14.54*10﹣6/k

aa=6.2*10﹣6/k

ac=10.7*10﹣6/k


Optical Homogeneity 5*10﹣5/cm 10﹣6/cm 10﹣6/cm
Absorption Coefficient <0.1%@1064nm< td=""> <0.1%@1064nm< td=""> <0.1%@1064nm< td="">

Refractive Index,

Birefringence(△n=ne-no)

Walk-Off Angle@45°(ρ)

ne=2.20263,no=2.28629

△n=0.08366

ρ=2.135°@633nm

ne=1.38876,No=1.37698

△n=0.01178

ρ=0.488°@633nm

ne=1.55170,No=1.54265

△n=0.00905

ρ=0.335°@532nm


Capabilities


Diameter Max.30-40mm Max.50mm Max.100mm
Length Max.25-35mm Max.100mm Max.100mm
Surface Quality Better than 20/10 Scratch/Dig Per MIL-0-13830A
Beam Deviation <10arc seconds
Optical Axis Orientation +/-0.2°
Flatness <λ/8@633nm
Transmission Wavefront Distortion <λ/4@633nm
Coating  Upon Specification
crystal birefringent YVO4


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